Document type:
Title:
Revision date:
Revision:
User's Manual (MUT)
Mod. SY2527, Universal Multichannel Power Supply System
27/11/2000
0
NPO:
Filename:
Number of pages:
Page:
00103/97:2527y.MUTx/00
SY2527USERMANUAL_REV0.DOC
84
22
4.2.1
NIM / TTL standard selection
A two-position switch, located on the front panel, allows to select the standard for almost
all the control output signals.
Nominally, the switch position affects the standard of the OVC, UNV, OVV, CH-ON, RST
FLAG, CHK PASSED, TRIP and GEN signals.
The standard for the inputs on the front panel can be either NIM or TTL independently
from the position of this switch.
The two switch positions correspond to:
•
Left position (NIM)
:
NIM
standard (relevant green LED alight)
•
Right position (TTL)
:
TTL
standard (relevant green LED alight).
4.2.2
LOCAL/REMOTE Power-On
The system can be powered on either locally or remotely. The
POWER-ON key
, located
on the front panel of the Primary Power Supply, has three different positions:
•
Central position (OFF)
: the system is turned off;
•
Right
position (LOCAL)
: the system is turned on locally;
•
Left
position (REMOTE)
: the system is enabled to be turned on remotely: the
remote power on of the system will occur by sending a proper
REMOTE IN
input
signal
through the relevant connector.
The REMOTE IN input signal (see Fig. 5.1 for the connector location on the front panel)
must be a +12 V input level (50 mA max.; tolerance: -40%
÷
+20%). As the REMOTE IN
connector is supplied with +12 V, the REMOTE OUT connector provides itself a +12 V
voltage level (with a delay of some seconds; tolerance: -20%
÷
+20%) that can be used
to power on another crate remotely. This feature allows to power on many crates with a
single signal.
N.B. The system can be turned on only if the MAIN switch on the rear panel is in the
position 1.
4.2.3
LOCAL/REMOTE Channel Enable
The channel outputs can be enabled either locally or remotely.
A three-position lever switch (
LOC ENABLE / REM ENABLE / DISABLE switch
) allows
for the selection of the enable mode:
•
Central position (DISABLE)
: the channel outputs are disabled;
•
Upper position (LOC ENABLE):
the channel outputs are enabled locally (LOC
ENABLE red LED on);
•
Lower position (REM ENABLE)
: the channel outputs can be enabled remotely:
the remote enable of the channel outputs will occur by sending a proper
ENABLE input
signal
through the relevant connector (the REM ENABLE red
LED is alight as the ENABLE signal is TRUE).
As the channels are enabled either locally or remotely, their output voltages of the
channels which are ON increase up to the programmed value (V0SET or V1SET,
